Why? Because the work was made of tissues covered in the artist’s own bodily fluids and excrement.

When Apple dismantled the exhibition, instead of throwing the exhibits out, he carefully stored the samples.

And now, they are being used for scientific discovery.

Dr Justin O'Sullivan from the Auckland University-based Liggins Institute said the samples offered a valuable insight.

“These sorts of samples are a bit like gold dust.”

Apple has provided recent samples to allow a comparison to be made.

So what is science doing with the esteemed artist’s ancient wipings?

The researchers are taking the samples and extracting all the DNA out of them, and looking to see which bacteria are present in the samples 40 years ago, and which ones are present in the samples today.

“We’re able to test and see whether his flora has changed markedly between these two time points,” Dr O’Sullivan says.

He says bacteria are an interface between you and your environment and an interface between health and disease.

“By understanding these bacteria we can start to understand the development of some of the non-communicable disorders - insulin resistance or diabetes.